2013 Gauss 8 Problem 6

What number goes in the box so that 10 \times 20 \times 30 \times 40 \times 50 = 100 \times 2 \times 300 \times 4 \times \square?

\textbf{(A)}\ 0.5\quad \textbf{(B)}\ 5\quad \textbf{(C)}\ 50\quad \textbf{(D)}\ 500\quad \textbf{(E)}\ 5000

If there are no answer choices shown, enter a numerical answer.

Full credit to this problem is given to the CEMC, you may view all Gauss contests here.